Fiber diameter in electrospinning process
Fiber diameter in electrospinning process
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DOI：
10.1016/j.elstat.2012.12.018
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发表时间：
2013-06-01
影响因子：
1.8
通讯作者：
Cramariuc, Oana
中科院分区：
文献类型：
--
作者：
Cramariuc, Bogdan;Cramariuc, Radu;Cramariuc, Oana
为了增加对纤维直径的控制，我们在本文中提出了一种方法来确定稳定域的过程中，静电纺丝纤维直径可以预先确定，也可以通过聚合物溶液的流量和施加的电压进行控制。为了定义这些稳定域，我们采用了一个组合的解析表达式，这取决于位置沿着行进射流。在喷嘴附近，我们采用将纤维直径与聚合物溶液的运动粘度、喷嘴-收集器距离、溶液密度、液体流量、电流和静电场强度联系起来的表达式。在离喷嘴较大的距离处，纤维直径可以表示为溶液密度、液体流量、所施加的静电场的强度和离喷嘴的距离的函数。靠近收集器的纤维直径可以相对于聚合物溶液的表面张力、介电常数、液体流量和电流强度来表示。在特定的约束条件下，从这些数学表达式获得的曲线的叠加将用于确定纤维直径的稳定域，其中直径可以通过两个工艺参数来控制，即施加的电压和聚合物溶液流量。通过这种方法，本文件可以有助于增加控制的静电纺丝过程，从而提高适用性。(C)2013爱思唯尔有限公司版权所有。
In order to increase the control on the fiber diameter we propose in this paper a methodology to determine stability domains of the process in which the electrospun fiber diameter can be predetermined and also controlled by means of the polymer solution flow and the applied voltage. To define these stability domains we employ a combination of analytical expressions depending on the location along the traveling jet. In the vicinity of the nozzle we employ the expression which links the fiber diameter with the kinematic viscosity of the polymer solution, nozzle-collector distance, solution density, liquid flow, electric current and intensity of the electrostatic field. At larger distances from the nozzle, the fiber diameter can be expressed as a function of solution density, liquid flow, intensity of the applied electrostatic field and distance from the nozzle. Close to the collector the fiber diameter can be expressed with respect to the superficial tension of the polymer solution, dielectric permittivity, liquid flow and intensity of the electric current. Under specific constrains, the superposition of the plots obtained from these mathematical expressions will be used to determine the stability domain for the fiber diameter in which the diameter can be controlled by two process parameters, namely applied voltage and polymer solution flow. Through this approach the present paper can contribute to increased control of the electrospinning process and thus enhanced applicability. (C) 2013 Elsevier B.V. All rights reserved.